Young Thug continues to crank out head-spinning music faster than almost any of his peers on Atlanta’s rap underground; he’s been in the zone for something like two weeks running. Last week, he and Metro Thuggin teamed up for the strong “Free Gucci.” If anything, he’s further upping his game on “I Swear To God.” London On Da Track, the producer behind the great Rich Gang: Tha Tour Part 1 mixtape, handles the beat. And Thug goes into drugged-the-fuck-out crooner mode, drooling over a girl who apparently works for the FADER and sounding not unlike “I Feel Like Dying”-era Lil Wayne. Listen below.